Pencil-sharpener



(No Model.)

G. H. PHELPS'.

PENCIL SHARPENLR.

NITED Sra'rEs PATENT @Erica GEORGE H. PHELPs, OE NEWTON, MAssAOHUsE'rrs.

PENCIL-SHARPENER.

SPECIFICATION forming part of Iietters Patent No. 334,803, dated January 26, 1886 Application filed October 12. 1885. Serial No. 179,600.

To all whom it may concern:

Be it known that I, GEORGE H. PHELPs, of Newton, county of Middlesex, State of Massachusetts, have invented an AImprovement in Pencil-Sharpeners, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

My invention relates to and is an improvement on that class of pencil-Sharpeners shown in United States Patent No. 304,371, dated September 2, 1884.

In the machine described in the patent referred to the tile is keptin contact with the pencil to be sharpened by a spring, which, to be effective with ordinary lead pencils, is required to be of considerable strength; but said spring of proper strength for pencils of the usual size is too strong for use when small or thin pencils, or pencils having soft lead, or slate-pencils are to be sharpened, and as a result such pencils are frequently broken.

The machine described in the patent has no means whatever to regulate the force ofthe said spring.

The Object of this invention is to improve the sad machine,so that, in addition to pencils of usual size, small pencils and slate-pencils may be sharpened.

In accordance with myinvention the shank of the iile-carrier supporting-plate is supported on the short arm of a lever, which arm enters a slot in the hollow post,which receives Within it the said shank, the said lever being acted upon by a spring or its equivalent, a weight, to .regulate the upward pressure ofthe file-carrier and iile toward the pencil being sharpened.

My invention consists, essentially, in the combination, with the file-carrier and its supporting-plate, of a lever, and means, substantially as described, to vary the effective pressure of the said lever with relation to the said nie-carrier supportingplate, as hereinafter particularly set forth and claimed.

Figure lis a rear side elevation of a machine embodying my invention; Fig. 2, a plan view of Fig. 1, with part of the crank or handle brokenV off; and Figs. 3, 4, and 5, details to be referred to.

(No model.)

The standard A, rising from the base-plate a, the bearing-hubs b b', for the shafts c c', beltpulley C, spur-pinion B, fast on the shaft c, spur-gear E on shaft c and in mesh with the said pinion, the handle d, belt e, pulley g, the sleeve m of the pencil-holder or chuck, the bearing h,nut k, thumbnut n, hollow post O, dle-carrier supporting-plate p, its depending pin or shank 2, the thumb-piece r, headed guiderod q, file carrier S, and tile x, are all substantially as in the patent referred to, wherein they are designated by like letters, and are not, therefore, herein claimed.

Instead of employing a spring, as in the said patent, to push the tile-carrier supportingplate toward the center of rotation of the chuck, I have, as herein shown, provided the hollow post O, with' a slot, 22, in which is extended the short arm 13 of lan elbow-lever, L, pivoted at 5, in uprights 6, secured to the base-plate a by screws ax, the said lever acted upon by a spring, 7, or its equivalent, a weight, as represented by dotted lines at 16, serving to force the file-carrier supportingplate toward the center of rotation of the chuck with more or less force, according to the position of the spring or weight on the lever.

The lever L, herein shown as notched at its top, as at 14, is provided with a. saddle, 10, with which is-connected one end ofthe spring i', the other end of which is secured at 8 to the plate a. The short arm 13 of the said lever (shown partially by dotted li n t i l r., and in full lines, Fig. 4) enters the slot 22 in the hollow post O, and supports the pin 2.

The pencil-clamp t', composed of three loose pieces, is herein shown as projecting through and beyond the open face of the nut 7c, the opening in the said nut being enlarged for such passage, thereby allowing the end of the said clamp to grasp the body of thepencil entirely outside of the said nut k, thus enabling the clamp forming part ofthe chuck to grasp the pencil to be sharpened closer to the file, thus reducing the breaking-strain on the pencil.

I desire itto be understood that I do not limit myself to the specific form of lever shown, as it is evident that many forms of levers might be used to accomplish the result obtained.

I claim-- In a pencil-Sharpener, a rotary chuck for IOO holding the pencil, a file-carrier, and means, the effective pressure ofthe le upon the pen- 1o substantially as set forth, to reciprocate it cil, substantially as described.

across the path of the pencil when it is in the In testimony whereoflhave signed my name chuck, and the movablesupport foi` the leto this specification in the presence of two suby carrier, combined with the lever L, having its scribing Witnesses.

shorter effective arm in contact with the mova.- GEO. H. PHELPS. ble support of the le-carrier, and provided Witnesses:

with a power device, such as a. Weight or G. W. GREGORY,

spring, or both, adjustable thereon to vary 1 J. H. CHURCHILL. 

